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| OTA Rings for John T. in Jackson ,Michigan. |
A set of OTA (optical tube assembly) rings for John T. in Jackson Michigan. I'm building a 13.1" (Coulter primary and secondary) for John with the Easy Transport (
ETT) option. The mirror board, on the left, has the beginnings of a 6-point flotation mirror cell with aluminum and Baltic birch components. After building about a dozen of these telescopes, I found this to be a good combination for these mirrors.
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